<!doctype html>
<html lang="en" xmlns:v-bind="http://www.w3.org/1999/xhtml" xmlns:v-on="http://www.w3.org/1999/xhtml" xmlns:v-model="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
<div id="app">
   <button :title="cnt" @click="add">{{cnt}}</button>
</div>
</body>
<script src="../../vender/vue@2.4.2.js"></script>
<script>

    var vm=new Vue({
        el:'#app',
        data:{
            cnt:0
        },
        methods:{
            add: function () {
                this.cnt++;
            }
        }
    });

</script>
</html>